Word Origin & History

steady 1530, replacing earlier steadfast, from stead + adj. suffix -y, perhaps on model of M.Du., M.L.G. stadig. O.E. had stæððig "grave, serious," and stedig "barren," but neither seems to be the direct source of the modern word. O.N. cognate stoðugr "steady, stable" was closer in sense. Originally of things; of persons or minds from 1602. Meaning "working at an even rate" is first recorded in 1548. The verb also is first recorded 1530. Noun meaning "one's boyfriend or girlfriend" is from 1897; to go steady is 1905 in teenager slang. Steady progress is etymologically a contradiction ...in terms. Steady state first attested 1885; as a cosmological theory (propounded by Bondi, Gold, and Hoyle), it is attested from 1948.